Three lamps are connected in series across a 120V supply and take a current of 1.5A. If the resistance of two of the lamps is 30Ω, what is the resistance of the third lamp?

SSC JE Electrical 2019 with solution SET-1
Three lamps are connected in series across a 120V supply and take a current of 1.5A. If the resistance of two of the lamps is 30Ω, what is the resistance of the third lamp?

10Ω

30Ω

20Ω

40Ω

10Ω

30Ω

20Ω

40Ω

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SSC JE Electrical 2019 with solution SET-1
With the current direction marked in the circuit shown, the net voltage applied is

V1

V2

(V2 − V1)

−(V2 − V1)

V1

V2

(V2 − V1)

−(V2 − V1)

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SSC JE Electrical 2019 with solution SET-1
What is the reason behind using a centrifugal switch in a single-phase induction motor?

To cut-off the starting winding at an appropriate instant

To improve the starting performance of the motor

To protect the motor from overloading

To out in the capacitor during running conditions

To cut-off the starting winding at an appropriate instant

To improve the starting performance of the motor

To protect the motor from overloading

To out in the capacitor during running conditions

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SSC JE Electrical 2019 with solution SET-1
Which of the following fuel has the least calorific value?

Wood

Kerosene oil

LPG

Hydrogen

Wood

Kerosene oil

LPG

Hydrogen

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SSC JE Electrical 2019 with solution SET-1
A 200 V d.c machine as Ra = 0.5 Ω and its full-load Ia= 20A. Determine the induced e.m.f when the machine acts as a motor

190 V

215 V

200 V

210 V

190 V

215 V

200 V

210 V

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SSC JE Electrical 2019 with solution SET-1
The direction of the arrow represents the direction of when the diode is forward biased

P-type material

P-N Junction

Conventional current flow

N-type material

P-type material

P-N Junction

Conventional current flow

N-type material

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SSC JE Electrical 2019 with solution SET-1

SSC JE Electrical 2019 with solution SET-1 Three lamps are connected in series across a 120V supply and take a current of 1.5A. If the resistance of two of the lamps is 30Ω, what is the resistance of the third lamp?

SSC JE Electrical 2019 with solution SET-1 With the current direction marked in the circuit shown, the net voltage applied is

SSC JE Electrical 2019 with solution SET-1 What is the reason behind using a centrifugal switch in a single-phase induction motor?

SSC JE Electrical 2019 with solution SET-1 Which of the following fuel has the least calorific value?

SSC JE Electrical 2019 with solution SET-1 A 200 V d.c machine as Ra = 0.5 Ω and its full-load Ia= 20A. Determine the induced e.m.f when the machine acts as a motor

SSC JE Electrical 2019 with solution SET-1 The direction of the arrow represents the direction of when the diode is forward biased

SSC JE Electrical 2019 with solution SET-1
Three lamps are connected in series across a 120V supply and take a current of 1.5A. If the resistance of two of the lamps is 30Ω, what is the resistance of the third lamp?

SSC JE Electrical 2019 with solution SET-1
With the current direction marked in the circuit shown, the net voltage applied is

SSC JE Electrical 2019 with solution SET-1
What is the reason behind using a centrifugal switch in a single-phase induction motor?

SSC JE Electrical 2019 with solution SET-1
Which of the following fuel has the least calorific value?

SSC JE Electrical 2019 with solution SET-1
A 200 V d.c machine as Ra = 0.5 Ω and its full-load Ia= 20A. Determine the induced e.m.f when the machine acts as a motor

SSC JE Electrical 2019 with solution SET-1
The direction of the arrow represents the direction of when the diode is forward biased